To design a user-friendly sign-up form, consider the following: 1. Minimal Fields: Only ask for essential information, typically the email address and perhaps the first name. 2. Clear Call-to-Action: Use a prominent and compelling call-to-action button such as "Subscribe Now" or "Join Us." 3. Mobile Optimization: Ensure the form is mobile-friendly to cater to users on various devices. 4. Privacy Assurance: Include a brief note about privacy to build trust, such as "We respect your privacy and will never share your info."